Sharpener for slicing machines



Judy M13, H923. Li-@LWS R. W. BACHMAN SHARPENER FOR SLICING MACHINES Filed Nov. 21, 1921 3 Sheets-Shee'c l Juy w, 1923. Mmmm R. W. BACHMAN SHARPENER FOR SLICING MACHINES Filed Nov. 21, 1921 3 Sheets-Sheet 2 July l0, R923.

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VR. w. BACHMAN SHARPENER FOR SLICING MACHINES Filed Nov. 21, 1921 3 Sheets-Sheet 3 Patented .lluly 19, 1923.

uauTen sTaTes RUDOLPH W. BACHMAN, OF LPORTE,

INDIANA, ASSG-NOR T0 U. S. SLICING MACHNE COMPANY, OF LAPORTE, INDIANA, A CORPORATION OF WANA..

SHARPENER FOR SLICING MACHINES.

Application filed November 21, 1921. Serial No. 516,725.

To all whom t may con cem f Be it known that 1. RUDOLPH W. BACH MAN, a citizen of the United States, residing at Laporte, in the county of Laporte and State of Indiana, have invented certain new and useful Improvements in Sharpeners for Slicing Machines, of which the following,

is a specification.

This invention relates to a device for sharpening the circular knives of meat-sli@ ing machines, and has for its object the provision of a sharpening device of the class named, which shall be of improved construction and operation.

rlhe invention is exemplified in the combination and arrangement of parts shown in the accompanying drawings and described in the following specification, and it is Amore particularly pointed out in the appended claims.

ln the drawings,-

Fig. 1 is an elevation of a Sharpener embodying one form of thepresent invention, with the casing in section.

Fig. 2 is a horizontal section on line 2 2 of Fig. 1.

Fig. 3 is a. vertical section on line 3--3 of Fig. 1.

Fig. 4 is a Vertical section similar to Fig. 3, but having the sharpener casing in a different position on its supporting base.

This invention is of the same general character as the Sharpeners shown in prior Patents No. 1,039,210, of September 24, 1912, to Hendrik Stukart, and No. 1,291,235, of January 14, 1919, to C. F. M. van Berkel.

rThe Sharpener is supported on a bracket or pedestal 10, which is carried b v the slicing-machine frame and positioned adjacent the rotary-disk knife, shown at 11 in Fig. 4 of the drawing. A sleeve 12 is mounted to slide vertically in the pedestal 10 and is provided with a groove or keyway 13 which co-operates with a stud 14 to hold the sleeve and pedestal in fixed angular position relative to one another. rl`he pedestal 10 is split at l5 and. may he clai'nped upon the sleeve 12 by a bolt and nut 1G to hold the sleeve in various vertical positions of adjustment. At the upper end ofthe sleeve 12 is fixed a segmental plate 17 having perforations 18 and 19 therein. A standard 20 is mountedto slide and turn in the sleeve 12, and the casing 21 for the sharpening mechanism is secured to the upper end of the standard 2O by a nut 22. A pin 23 is threaded or otherwise secured in the base 24 of the casing 21 in position to engage the openings 18 and 19 in the segmental plate 17. When the pin 23 registers with the opening 18, the casing 21 will be in the position shown in Fig. 4, in which the sharpening wheels, one of which is shown at 25, are in operative relation to the knife 11. When the casing is raised to lift the sharpening wheels above the edge of the knife and to free the pin 23 from the opening 18, the casing may be rotated through an. angle of forty-ve degrees to bring the pin 23 into registration with the opening 19. t will be noted that the opening 19 is less diameter than the pin 23, so that when the pin is in this position the casing will be supported in a raised position with the Sharpener wheels turned away from the knif The Sharpener Wheels are moved toward liti and from the knife 11 when the casing is in its operating position, by a handle 26 rotatably mounted on a shaft 27 which is carried by the front wall of the casing 21. A cam 28 is fixed to the handle 26 and controls the movements of the Sharpener wheels in the manner explained in the patents referred to above. When the handle is in the position shown in Fig. 1, the Sharpeners are held out of contact with the knife, and when the handle is moved to the right to bring the detent 29 into engagement with the openings 30 and 31, the Sharpeners will be successively brought into operative contact with the knife. interlocking mechanism is provided between the support for the casing and the operating cam for the Sharpeners to prevent movement of the casing for shifting the position of the sharpeners when the Sharpeners are advanced toward the knife by the cam 28.

This interlocking mechanism comprises a lever 32 pivoted at 33 on the base member 24 of the4 casing, and provided with a downwardly projecting tail piece 34 having a. hook 35 for limiting the upward movement of the casing, and having an adjustable set screw 36 which engages a stop 37 on the segmental plate 17 to hold the casing against upward movement during a grinding operation. The lever 32 is provided at its upper end with a contact nose 38 which co-operates with the rear face of the cam 28. As shown in Figs. l and 3. the cam 28 has a portion of its rear face cut away at 39, which cut-away portion receives the nose 38 of the lever 32 when the cam is rotated into position to bring the cut-away portion into registration with the nose. A spring 40 tends to rotate the lever 32 in a direction to move the nose 38 away from the face of the cam 28. The spring 40 may be conveniently seated in the upper portion of the sameopen.- ing used for receiving the pin 23. When the casing 21 is in its lowermost position, with the pin 23 registering in the opening 18, the set screw 36 will engage the stop 3T to retain the casing against upward movement. As long as the handle 26 is in the position shown in lFig. l, the lever 32 will be free to rotate in a clockwise direction as viewed in Fig. 4, to permit the set screw 36 to pass the stop 37 and allow the casing 21 to be raised. As soon, however, as 'the handle 26 is moved in a clockwise direction in Fig. l, to advance the grinder toward 'the slicing knife, the nose 38 of the lever 32 will be moved out of registration with the depression 39 on the cam 28, and the lever 32 will be rocked by the cam against rotation on its pivot. This will hold the set screw 36 in contact with the stop 37 so that it will be impossible to raise the casing when the grinders are advanced toward or into Contact with the slicing knife. Before the casing can be raised it is necessary to withdraw the rinders from engagement with the knife Sy bringing the lever 26 to its extreme retracted position. shown in Fig. 1. By this means it is made impossible to draw the Sharpener across the edge of the slicing knife by raising the casing while the grinders are left in operative engagement with the knife. Another important function is performed by the set screw 36 and stop 37. lVhenever the grinders are in operative Contact with the knife, the casing will be held against any upward movement by the set screw and stop. This will retain the grinders in the same position relative to the edge of the knife during the entire sharpening operation and prevent any distortion of the knifes edge which might otherwise occur if the casing were permitted to rise, as it might sometimes do under the pressure ofthe grinder springs and the force of rotation of the knife. The set screw 36 is made adjustable, and a lock nut 41 is provided for holding it in its adjusted posit-ions, so that the parts may be accurately iittedftotakeup any lost motion and thus positively retain the casing in a fined position on its support.

After the handle 26 has beenrotated to release the grinders, the casing may then be lifted and swung about its vertical axis to remove the grinders from operating position. The pin 23 will prevent any rotation of the casing until it is lifted to free the rinders from the edge of the knife. During t e upward movement of the casing the lever 32 is positively moved in a clockwise direction to bring the nose 38 into the depression 39, and thus lock the cam 28 so as to hold the grinders in their retracted position. So long as the casing is lifted, the nose 38 will prevent rotation of the cam 28, for the reason that the edge l2 of the lever 32 will bear against the edge of the plate 17 for all positions of the casing above the operating position shown in F ig. a. This arrangement makes it impossible to advance the grinders toward the slicing knife until the casing has been lowered to bring the grinders opposite the lateral faces of the edge. .lf it were not for this arrangement the grinders might be brought down upon the edge of the knife, thus marring the edge. The stop 37 is so formed that after the point of the set screw 36 has come into engagement with 'the stop, the further movement of the lever about its pivot 33 during the slight remaining downward movement of the casing will be controlled by the set screw and stop rather lthan by the edge ll2 of the lever, so that in the lnal operating position of the casing the position of the lever will be controlled by the set screw and stop, and not by the edge 42 of the lever. l

The adjustment of the sleeve 12 in the pedestal 10 permits the parts to be set accurately, so that when the casing 21 is in its lowermost position the grinders will be properly disposed relative to the edge of the knife 11. As the knife gradually wears away, the sleeve 12 may be readjusted to fit the grinders to the varying diameters of the knife.

I claim:

1. Sharpening mechanism for a rotary slicing knife comprisingT a grinder, an adjustable support for said grinder, and an adjustable device for retaining said grinder and support in fixed position relative to one another during a sharpening operation.

2. Sharpening mechanism for a rotar slicing knife comprising a grinder, an a justable support for said grinder movable in a radial direction relative to said knife, said grinder being movable on said support and adjustable means for holding said grinder against radial movement relative to said support and knife during a slicing operation.

3. Sharpening mechanism for rotary slicing knives comprising a. grinder, a frame for supporting said grinder, said grinder being shiftable in a radial direction relative to said knife, means 'for moving said grinder in a direction transverse to the plane of said knife, andv means for holding said grinder against radial movement relative to said knife when said grinder is in a given position transversely of the plane of said knife, said last-named means being adjustable to accurately retain said grinder in a predetermined radial position relative to said knife during a grinding operation.

4. A sharpener for a rotary slioing'knife comprising a grinder, a vertically movable support for said grinder, means for shifting said grinder horizontally into and out of operative relation With said knife, and means' for preventing vertical movement of saidY grinder While horizontally adjusted into operative relation with said knife, said lastnamed means being adjustable vto insure accurate positioning of Said grinder in a vertical direction during a sharpening operation.

5. Sharpening mechanism for a rotary slicing knife comprising a grinder, a support for said grinder movable in a radial direction relative to said knife, and adjustable means for limitingI the radial movement of said grinder toward said knife for aeourately fixing the operative position of said grinder relative to said knife.

6. Sharpening mechanism for a rotary slicing knife comprising a grinder, a frame for supporting said grinder, said frame being movable to shift said grinder in a radial direction relative to'said knife, a support for said frame, means on said support for limiting the movement of said frame in a radial direction toward said knife, and means for adjusting the position of said limiting means to accurately position said grinder relative to Said knife during sharpening operations.

7. Sharpening mechanism' for a slicing knife comprising a grinder, means for supporting said grinder for movement in the direction of the plane of said knife, adjustable means for limiting the movement of said grinder in said direction, and an adjustable devioeo for retaining said grinder in its limiting position.

8. Sharpening mechanism for a rotary slicing knife comprising a grinder, a frame for supporting said grinder for movement in the direction of the plane of said'knife, an adjustable stop for limiting the movement of said grinder in said direction toward said knife to locate said grinder in proper position for sharpening said knife, and an adjustable stop for preventing movement of said grinder away from said knife during agrinding operation.

9. `Sharpening mechanism for a rotary slicing knife comprising a grinder, a frame for supporting said grinder, a bracket for supporting said frame for radial movement toivard and away from said knife, adjustable means on said bracket for limiting the movement of said frame toward said knife, a stop for preventing movement of said frame away from said knife, and a threaded member connected with said frame for co-operation with said stop.

l0. Sharpening mechanism for a rotary slicing knife comprising a grinder, a frame for supporting said grinder, a standard for carrying said frame, a sleeve for receiving said standard, means for adjustably supporting said sleeve, a stop plate carried by said sleeve, means on said frame co-operating With said plate for interlocking said frame and grinder to control the relative movement thereof, and a threaded member carried by said interlocking means and cooperating Witli said plate for holding said grinder against movement avvav from said knife When in operative position relative thereto.

ln testimony whereof i have signed my name to this specification on this 17th day 0f 'i November, A. 1ML 

